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Sequoia <br />Analytical <br />Gettier Ryan Inc - Dublin <br />6747 Sierra Court Suite J <br />Dublm CA 94568 <br />Project Chevron <br />Project Number Chevron # 9-5775 <br />Project Manager Scott Polston <br />Volatile Organic Compounds by EPA Method 8260A - Quality Control <br />Sequoia Analytical - Walnut Creek <br />Reporting Spike Source %REC <br />Result Limit Units Level Result %REC Limits RPD <br />Batch 0608002 - EPA 5030B [PIT] <br />404 N Wlget Lane <br />Walnut Geek. CA 94598 <br />(975)988-9600 <br />FAX (925) 988-9673 <br />www sequotaiabs com <br />Reported <br />25 -Jul -00 10 44 <br />RPD <br />Limn Notes <br />Page 22 of 25 <br />Im <br />Prepared & Analyzed 06 -Jul -00 <br />LCS (0008002-BS1) <br />11-Dichloroethene <br />$95 <br />20 <br />u911 <br />500 119 65-135 <br />Methyt tert-buts! ether <br />539 <br />20 <br />Soo 108 65-135 <br />Benzene <br />59 5 <br />10 <br />500 119 70-130 <br />Tnehlorocthene <br />553 <br />2 0 <br />500 111 70-130 <br />Toluene <br />537 <br />20 <br />50 0 107 70-130 <br />Chlorobenzene <br />53 4 <br />2 0 <br />500 107 70-130 <br />Surrogate DibromoJluaromethane <br />53 0 <br />500 106 50-150 <br />Surrogate I 1-Diehloroethane-d4 <br />510 <br />Soo 101 50-150 <br />Surrogate Toluene -d8 <br />500 <br />Soo 100 50150 <br />Surrogate 4-Bromofluonobenzene <br />520 <br />500 104 50 -ISO <br />Prepared & Analyzed 08-Jul-00 <br />ANKCS (OG08002-BS2) <br />-Duliloroethene <br />573 <br />2 0 <br />ug/l <br />500 115 65-135 <br />Methyl tert-butyl ether <br />567 <br />2 0 <br />Soo 113 65-135 <br />Bcmme <br />59 1 <br />10 <br />500 118 70-130 <br />Trichloroethene <br />56 7 <br />20 <br />SO 0 113 70-130 <br />Toluene <br />559 <br />20 <br />Soo 112 70-130 <br />Cldorobenzene <br />557 <br />2 0 <br />500 111 70-130 <br />Surrogate Dibromrrfluonomedu m <br />510 <br />Soo 104 50.150 <br />Sumogate 12-Dtehloroetlrane-d4 <br />51.0 <br />Soo 104 50-150 <br />Sumate Toluene -d8 <br />50.0 <br />" <br />50.0 100 50130 <br />Surrogate 4-Bromofluombemew <br />520 <br />" <br />500 104 50-150 <br />Matra Spike (0008002 -MSI) <br />Source W006678-18 <br />Prepared & Analyzed. 06 -Jul -00 <br />1,1-Dichloroethene <br />509 <br />20 <br />ng/l <br />Soo ND 102 60.140 <br />Methyl tert-butyl ether <br />527 <br />20 <br />" <br />500 105 60-140 <br />BCW.me <br />S2,7 <br />10 <br />500 ND 105 60.140 <br />Triddormthene <br />513 <br />20 <br />500 31 964 60.140 <br />Toluene <br />469 <br />20 <br />500 ND 939 60-140 <br />ChlawbawAne <br />4&7 <br />20 <br />500 ND 974 60-140 <br />Surrogwe Dibromofhtaromerhmx <br />530 <br />Soo 106 50150 <br />Sirrrogau 1 1-Dwhloroeduose-d4 <br />530 <br />SO 0 106 -50-150 <br />Surrogate Toluene-& <br />Soo <br />SO 0 100 50 -ISO <br />Sumnate 4-Bnomofluoroberaene <br />SI 0 <br />Soo 101 50-150 <br />77re results in taus r'epon't apply to the samples anatj+red rn accordwwe with rhe churn of <br />Ota Analytical -Walnut Creek <br />custody documem This mnalyacal report must be reproduced in its entirety <br />Page 22 of 25 <br />Im <br />